the scott brown campaign immediately pounced calling it a hypothetical critical sham. elizabeth warren is considered a darnell among democrats challenging governor scott brown. in the last week, though, she's found herself on the defensive, faced with questions about why she identified herself as native-american while teaching at harvard law school. those questions -- listed herself as a minority in law school directories in the '80s and '90s. >> i am very proud of my heritage. i am very proud of the stories that my grandparents told me, that my grandparents told my parents and my parents told my brothers and me. being native-american is being part of who our family is. >> reporter: new england's historic gene logical society says an . . the media has been asking a lot of questions. i have been following it just like you have. if there are questions, she should answer them. >> harvard's newspaper, the crimson quotes administrators in 1996 and '98, talking about warren's native american heritage as a touted staff. the university says harvard recruited her and that her b